Crushing-mill



.(Nu Model.) 2 She'ets--8heet 2.

Fl A. HUNTINGTON.

GRUSHING MILL.

No.-325,804. v Patented Sept; 8-, 1885.

N. PUERS. Pholo-Lifllogmphun Washington D. I;

i UNITED STATES JPATENT OF ICE.

I FRANK HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

CRUSHINIG-CMILL.

SPECIFICATION forming part of Letters Patent No. 325,804, dated September 8, 1885.

Application filed May 18, 18 55. (No iuoel.)

, following to bea full, clear, and exact description of the same.

My invention relatesto a crushing mill which is moreespecially intended for the crushing of quartz and valuable metal-bearing rock.

It consists in certain details of construction relating to the crushers, the manner of suspending and lubricating them and protecting them from dirt and grit, and in the construction of scrapers which are used therewith,all of which will be more fully explained by reference to the accompanying drawings,in which- Figure 1 is a vertical section of the mill, showing the rollers with their stems and sleeves. Fig.2 is a view of one'of the scrapers. Fig. 3 is. aplan view showing the driving-disk and the partsfrom which the rollers are suspended.

A is a circular pan having a ring-die, B, fixed around its interior, near the bottom, and having suitable discharge openings and screens, this portion being constructed like that shown in my Patent No. 277,134, of May 8, 1883.

The rollers C, which do the crushing, have exterior circular shoes, D, secured to them, these shoes rolling against the'interior of the die B, so that the material is crushed between themfland the wear comes upon the shoes and die, which may be easily replaced whenever it is necessary. These shoes, which are, preferably, of rolled steel, are formed with flanges a around their interiors near the bottoms, and hook-bolts b pass through the rollersG, with the hooks beneath the flanges, so as to support the dies and hold them in place. I

Wooden wedges c are driven between the shoes and the rollers, and as they swell when wet they will hold the two firmly together.

The flanges a are held by the hook-bolts against the bottoms of the rollers,and they prevent the dies from being forced up by the pieces of rock which may be jammed below them.

The die around the interior of the pan is secured by wooden wedgesin a manner similar to those above described.

A sleeve, E, extends upward from each of the rollers C, and has a hole made through it to allow the shaft F, by which the crushingroller is suspended, to pass down through the sleeve and through the roller. The lower end of this shaft has an enlargement or head, G, formed upon it, and a correspondingchamber is made in the bottom of the crushing-roller to receive this head. 7

Between the head and the interior of the relieve the parts of friction.

A cap or plate, I, is fitted with rubber or other packing, so as to screw upon the bottom of the crushing-roller, thus making the chamber within which is the head of the suspended shaft perfectly tight, and this chamber 1s then filled with oil or lubricant, so that the roller may turn easily upon the shaft, and at the same time be kept entirely free from the grit and dirt.

J is the driving-disk, from which the rollers are suspended as follows: Kisa sleeve having trunnions Lprojecting to each side from it, and these trunnions turn in boxes supported upon the disk so that the trunnions stand at right angles with a radial line from the center of the disk. The upper end of the shaft is keyed 1n this sleeve, and the lower end of the sleeve has an enlarged opening which fits over the upper end of the sleeve E, as shown. Th1s prevents any dirt from falling in at the top of the lower sleeve and working down around the shaft, thus keeping the whole of that portion entirely clean and well lubricated.

curved openings K, so that when the trunnions are lifted out from their journal-boxes the shafts, with their sleeves and the attached rollers, may be lifted directly out through these openings without in any way disturbing any other part of the mill. By this construction the rollers are allowed to swing inward and outward with the suspending trunnions, and as the disk is driven around by the central driving-shaft, M, to which it is keyed,and the gearingNbelow the roller C will be caused interior die, which is fixed within the pan, thus crushing all the material which may come between them until it has reached a suitable fineness.

The pan has a flange, L, projectinginward- The disk J is peculiarly formed with large to rotate about the shaft F, rolling against the v chamber washers H are placed, which serve to H 1y a short distance above the screen-openings, and the efi'ect of this flange is to turn the material downward and prevent the tendency to rise to the top by the centrifugal and upward action as it escapes from between the rollers and die.

Scrapers are used in connection with these roll rs in the same manner as in my former patent, but I have improved my scrapers as follows: 0 are the vertical rods or arms to which they are secured, and which are made adjustable up and down in the driving-disk J. P are the scrapers which are fixed to them. These scrapers aremade with double edges,as shown,and have two boltholes through them, through which bolts Q pass, and by which they are firmlysecured to the arms.

Whenever the lower edge of the scraper becomes worn, or for any other reason it may become necessary, it is easily removed and reversed so that the other edge projects downward and may be made to work.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The pan having the interior die, and the fixed or non-rotating shafts suspended from above and having heads or enlargements upon their lower ends, in combination with rollers turning loosely about said shafts,substantiall y as herein described.

2. The pan having the interior circular die, therotating disk, and the vertical shafts suspended from said rotating disks and having heads at their lower ends,in combination with rollers fitted loosely upon said shafts, having closed chambers within which the heads are contained,-and extensions or sleeves extendnpward around the shafts, substantially as herein described.

3. The pan having the interior die,the driving disk, the suspended shafts, and thelooselyfitted rollers having sleeves extending upwardly from them and surrounding the shafts,

rounding flanged dies, the securing-bolts, and

the intermediate fastening wedges, substantially as herein described.

In witness whereof I have hereunto set my hand.

FRANK A. HUNTINGTON.

\Vitnesses:

S. H. NoURsn, H. 0. LEE. 

